my Marantz 4400 is AMAZING! it brings out BASS in AKG K702 like I have never heard them produce before, sound's dance around in your head like it's 3D, it's super cool. I would not mind getting a new faceplate for it (it's kinda beat up...) other than that its great except the capacitors on the PSB, I can't really tell if it's 'glue' or they decided to defy gravity and leak all over. I am afraid to attach speakers to it (I took a risk with my K702's) because there seems to be something happening in the right channel. The scope is green, I was hoping for blue but it's ok. The DOLBY EQ does not work, when switched on it sounds awful and the meter is stuck. that board probably needs recapped. There is also a current going through the faceplate so the ground needs to be looked at maybe the resistor.
I cleaned the hell out of it, took it almost all apart, cleaned and waxed the faceplate and got all the grime off of it, only one light is burned out and that's the dial pointer. cleaned the amps, got all the dust out, and deoxed all the controls. It was super hard to get the two bolts off on the faceplate under the volume knob and the Dimension knob. The 40 year old glue rotted and the dial face is loose and the black clear plastic piece in the center decided to remain when I got the faceplate off so I had to glue that back into the faceplate. Let me tell you... the 4400 is H-E-A-V-Y HEAVY heavy h.....e....a....v...y.... I knew it was heavy but this is .........h.......e.......a......v.....y
I am learning how to fix them and fix them for a living. I got a de-solder pump and a soldering iron today and new fuses for the 4400 since they were 40 year old 1974 fuses in there. I am going to start off with re-capping my H/K 430 once I go through everything and find out what cap's etc are needed.
I'll have to take this 4400 to Audio-Specialties in Portland, OR to get LED's installed, the dial face put back together (not confident enough to take a 4400 apart no.....) and have it checked.
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Glue?
can't tell but the light is not blue, it is a dull ugly really dim green.